function rangecb(action)
%
% NOTE: This SOFTWARE may be used by any individual or corporation for any purpose
% with the exception of re-selling or re-distributing the SOFTWARE.
% By using this software, you are agreeing to the terms detailed in this software's
% Matlab source file.

% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by
% its 'AUTHOR' (identified above) and the CREWES Project.  The CREWES
% project may be contacted via email at:  crewesinfo@crewes.org
%
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) This SOFTWARE may be used by any individual or corporation for any purpose
%    with the exception of re-selling or re-distributing the SOFTWARE.
%
% 2) The AUTHOR and CREWES must be acknowledged in any resulting publications or
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if( nargin < 1 )
   action = 'init';
end
[shots, k, axeslist] = cvpinfo('get');
if( strcmp(action,'init'))
   q=str2mat('Enter the shot pair range: (first left:last left),(first right:last right)');
   a=str2mat('(10:15),(11:20)');
   askthingsinit('rangecb(''answ'')',q,a,[1],'Shot pair range');
elseif( strcmp(action,'answ'))
   a=askthingsfini;
   [strings tmp] = size(a);
   answer=a(1,:)
   % Calculate an array of shot pairs (use the answer from the popup box)
   shots = shotrange(answer);
   k = 1;
   % Turn on the next and previous buttons
   c = get(gcf, 'children');
   [nc tmp] = size(c);
   for i=1:nc
      if( strcmp(get(c(i),'type'),'uicontrol') )
         if( strcmp( get(c(i), 'string'), 'Next pair' ) | ... 
             strcmp( get(c(i), 'string'), 'Previous pair' ) )
            set(c(i), 'visible', 'on');
         end
      end
   end
   cvpinfo('set',shots, k, axeslist);
   editcvp('run')
end